Hello finaria,

 

Thank you for choosing Dell.

 

General memory module installation in case of R730XD is follow:

 

• RDIMMs and LRDIMMs must not be mixed.
• x4 and x8 DRAM based memory modules can be mixed. For more information, see the Mode-specific guidelines section.
• Up to three dual- or single-rank RDIMMs can be populated per channel.
• Up to three LRDIMMs can be populated per channel regardless of rank count.
• If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s) or slower depending on system DIMM configuration.
• Populate memory module sockets only if a processor is installed. For single-processor systems, sockets A1 to A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.
• Populate all the sockets with white release tabs first, followed by the black release tabs, and then the green release tabs.
• When mixing memory modules with different capacities, populate the sockets with memory modules with highest capacity first. For example, if you want to mix 4 GB and 8 GB memory modules, populate 8 GB memory modules in the sockets with white release tabs and 4 GB memory modules in the sockets with black release tabs.
• In a dual-processor configuration, the memory configuration for each processor should be identical. For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and so on.
• Memory modules of different capacities can be mixed provided other memory population rules are followed (for example, 4 GB and 8 GB memory modules can be mixed).
• Mixing of more than two memory module capacities in a system is not supported.
• Populate four memory modules per processor (one DIMM per channel) at a time to maximize performance.

 

Source: https://dell.to/3bAglGW

 

 

For PowerEdge R930 general memory module installation guidelines are follow:

 

• Populate DIMM sockets only if a processor is installed. For dual-processor systems, sockets A1 to A12, B1 to B12 and sockets C1 to C12, D1 to D12 are available. Each processor requires a minimum of 2 DIMMs, which must be identical.
• Populate all sockets with white release lever first, then black, and then green.
• Populate the sockets by highest rank count in the following order — first in sockets with white release levers, then black, and then green. For example, if you want to mix single-rank and dual-rank RDIMMs, populate single-rank RDIMMs in the sockets with white release tabs and dual-rank RDIMMs in the sockets with black release tabs.
• The memory configuration for each processor should be identical. For example, if you populate socket A1 and B1 for processor 1, then populate socket C1 and D1 for processor 2, and so on.
• Memory modules of different sizes can be mixed provided that other memory population rules are followed (for example 8 GB and 16 GB memory modules can be mixed).
• Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.
• If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s) or slower depending on system DIMM configuration.

 

Source: https://dell.to/2YeaPa0

 In case you have failed DIMM_A4, you need to replace it. It is important also to isolate memory issue before replacing. Not always errors on DIMMs indicates that DIMM needs to be replaced. Full troubleshooting steps you can find in this article:

https://dell.to/3BD3ZZd

 

Please ask me if you have any questions,

Thank you

Maria Januszka

#IWork4Dell

Dell | Social Outreach Services - Enterprise